[R-390] More geartrain rebuild info

[Barry]

List,

In the process of tearing down this geartrain, I noticed the planetary gears
were quite clogged with grease.  Scott's slide show says it probably isn't
necessary to tear the planetary gears apart, but it didn't appear I would
get this one clean unless I did and I'm sure glad I did.

Upon taking apart the three split gears, all three exhibited a fair amount
of drag when I twisted them against each other.  Upon closer inspection, I
could see small burrs on the teeth.  After removing these burrs, the gears
ride smoothly against each other.  I would never have known this unless I
disassembled them.  Also, it gives me a good chance to ensure a lot of the
hardened grease and dirt is removed.  After a 24-hour soaking in kerosene,
there was still a significant amount of grime in this assembly.

Now if I can figure out how to get four split gears all tensioned and
reassembled at the same time!

Barry(III) - N4BUQ